Weft stop-motion for looms.



Patented Aug. 14, I900.

E. ULDFIELD.

WEFT STOP MOTION FOR LOOMS.

(Application filed Feb. 16, 1893.)

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No. 655,9l0. Patented Aug. l4, I900. E. OLDFIELD.

WEFT STOP MOTION'FUR LOOMS.

(Application filed Feb. 16, 1898.)

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' ATFNT EDWIN OLDFIELD, OF NORWICH, CONNECTICUT.

WEFT STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 655,910, dated August 14, 1900.

Application filed February 16, 1898. Serial No. 670,599. (No model.)

T0 all whom it may concern:

Be it known that LEDWIN OLDFIELD, a citizen of the United States, residing at Norwich,

New London county, State of Connecticut, have invented certain new and useful Im-' provements in Weft Stop-Motions for Looms, of which the following is a full, clear, and exact description.

This invention relates to narrow fabric looms, and particularly to that class in which a multiple of shuttles is employed. My immediate purpose is to so improve such looms that the shuttle-quills shall be wound with the same length of filling-thread, and also to provide a novel form of mechanism whereby the loom will be stopped at the exact instant that said quills are emptied.

By means of my new construction the loom runs continuously until such time as it becomes necessary to remove the emptied quills from the entire series of shuttles and substitute full quills. The stopping of the loom is then performed positively and automatically and by means of Very simple mechanism. The quills are wound, as I have already stated, with a given length of filling and the loom is constructed to run just long enough to use said filling. As all the shuttles carry exactly the same length of filling, it will be obvious that they will all be emptied simultaneously and also that with one stoppage of the loom all of said shuttles will be recharged with full quills, thus avoiding the careful watching of ihe loom now necessary and the frequent stopping of said loom as the several quills are successively emptied of filling.

The drawings hereto illustrate my invention clearly.

Figure 1 is an end elevation of a part of a loom-frame having mounted thereon those elements that are immediately related to my invention and therefore necessary to explain the same, and Fig. 2 is a front elevation of the same parts. Fig. 3 is an endwise view of the batten and of certain of the elements of the stop-motion that are operated by said batten Figs. 4 and 5 illustrate by side and sectional views portions of the time mechan ism by means of which the loom is caused to stop at the desired instant. Fig. 6 illustrates a modification of the time mechanism of my invention.

In the drawings the letter a denotes the end frame of the loom; b, the breast-beam; c, the reciprocating-batten; d, the shuttle-race carried by said batten; e, a shuttle mounted in said race, and f one of the pendent arms or so-called swords, to the lower ends of which the batten c is secured.

The referenceletter g denotes the usual longitudinally-movable shipper-rod, one end of which is connected with the belt or frictionclutch controlling the driving-shaft of the loom, such connection being of the ordinary character,and Ihave therefore thought it unnecessary to illustrate it.

Secured to one end of the shipper-rod g is a strap g, that extends outward and downward over a roll h, mounted on the loom-frame,'

as seen in Figs. 1 and 2, the outer end of said strap being secured to one arm of a bell-crank lever e, which is also pivoted on the frame a.

The other (lower) arm of said bell-crank lever has pivoted thereto one end of a rod 75, that extends horizontally toward the rear of the loom a considerable distance, thence upward to form an odset or hook 7t, and terminating in a horizontal portion 75 that is pivoted to a vertical connecting-rod on, whose upper end is pivoted to one arm of a bell-crank lever 02, mounted upon the loom-frame, as seen in Fig. 1.

The swinging batten c carries an arm 0', whose lower end is bent rearward to provide a hook 0 The ofiset or hook it, which I have described, lies normally below the level of the hook c and out of the arc-shaped path described by said hook when the loomis in operation and the batten is swinging back and forth; but under certain conditions, asIshall explain presently, the book 71" is lifted into the path of hook c and as the batten continues its rearward movem out the rod it is carried with it, thus rocking the angle-lever t, as seen in dotted lines in Fig. 3, and moving the shipper-rod g endwise to shift the belt and stop the loom, as will be readily understood.

Projecting from the loom-frame a just above the crank-lever n is a threaded stud 0, upon which is loosely mounted a threaded roll whose circumference is grooved or weighted cord 1) in seeking to descend roslightly reduced, as at 0 to receive a weighted cordp and whose inner end is enlarged to provide a disk 0 whose edge is cut with ratchetteeth 0 q indicates an arm having a hub q, that is loosely mounted upon the stud o, the outer end of said arm being connected with one end of a rod s,whose other end bears an eccentric-strap s,that is operated by an eccentric t on the main shaft to of the loom in such manner as to give to the rod 3 an endwise-reciprocating movement at each revolution of the said shaft.

Pivoted to the arm q is a pawl g whose free end is held normally in engagement with the ratchet-teeth 0 by a spring 1 u denotes a detent or retaining pawl provided to prevent the backward rotation of the disk 0 Projecting from the outer face of said disk is a stud 0 The upper end of the crank -lever n extends upward to a point above the lowest position assumed by stud 0 when the latter is carried around by disk 0 but when the roll 0 is screwed home on the threaded stud 0, as in full lines, Fig. 4:, the stud 0 may make several revolutions with disk 0 without reaching the angle-lever 01. Each revolution, however, of said roll 0' causes it to be unscrewed on stud 0, and as the roll is thus gradually moved outward the stud 0 finally engages the angle-lever (see dotted lines, Fig. 4) and rocks said lever into the position shown by dotted lines in Fig. 1, thus raising the rod 70 and its offset Z6 into the path of the hook 0 which immediately "Jengages said offset and causes the shipperrod g to be moved to stop the loom. It should perhaps be stated that at each upward movement of the eccentric-rod s and 'arm (1 the pawl g engages one of the ratchet-teeth 0 and partially revolves the disk o and roll 0, the disk and roll beingv held from following the pawl back by the detent a. As the roll 0 is thus revolved, the cord 10 is gradually wound thereon and the weight elevated, as shown in dotted lines in Fig. 4. When the 100m is ready to be started again, the pawl and detent are lifted by the operator out of engagement with the ratchet-teeth when the weight 19 revolves the roll 0' and causes it to travel on the threaded stud toward the loomframe, thus carrying the stud o away from the crank-lever n. stood that when the loom is started it will run until such time as the stud 0 reaches and moves the crank-lever n and its connected parts, and that the length of time during which the loom is in operation will always be the same.

In Fig. 6 I have shown a modification of my invention in which the disk 0 and threaded roll 0 are held against rotation by a pawl 'Lt', which at the proper time is raised by clockwork of any suitable form, such a clock being indicated in said Fig. 6 by reference-letter w.

The clock is set to lift pawl u after the loom 1 has run a given length of time, and the It will now be under-' tates the roll 0' to unscrew said roll outward, and thus carry the pin 0 into engagement with the angle-lever n, when the latter is rocked (as already explained) to set in motion the belt-shipping devices. Having thus predetermined the length of time which the looms will run, I wind the quill in the shuttle a with a given length of filling-thread proportionate to such length of time and so that the filling-thread will be exhausted at pre cisely the instant that the loom stops.

If there are several shuttles, as in ribbon and other narrow-fabric looms, I wind the quills of all the bobbinswit-h exactly the same length of filling-thread, and as a result all the quills are simultaneously emptied and stopped. I am thus able to replenish the shuttles with full quills at a single stopping of the loom instead of having to stop it from time to time as each one of the several shuttles is emptied, as is now necessary.

Inasmuch as my describedlimprovement is automatic in its action the operator is entirely relieved from the tiresome watching of the quills now necessary. A further and very valuable feature of my invention is in the quality of the weaving produced.

In this class of looms as commonly constructed failure to stop the loom before the filling-thread is run out makes it necessary to pick back and adjust the fabric before piecing in the new filling-thread, and this invariably leaves a noticeable defect in said fabric when the weaving is begun again. This very objectionable result is entirely overcome by my described improvement, as the loom is stopped positively and automatically just as the last end of the filling-thread is leaving the quill.

My improvement is of such a character that moving disk placed thereon,and provided with a stud, and a mechanism for causing said disk or plate to revolve upon the stud for the purpose of stopping the loom, combined with means operated by said stud upon the disk or plate, the shipper-rod and mechanism for operating the shipper-rod, and a swinging batten which operates the mechanism connected with the shipper-rod when said mechanism is moved into the line of travel with said batten, substantially as shown.

2. In a loom,a supporting-stud,a disk which is movable laterally thereon, a mechanism for causing the disk to revolve, and move outwardly upon the stud, a mechanism for returning the disk to position on the stud, a suitable pawl for preventing the backward movement of the disk upon the stud, combined with means which are operated by said disk, when the disk has reached the end of its travel for stopping the loom, mechanism for operating the shipper-rod, and which is moved into the line of travel with the batten by the said means, the shipper-rod, and a swinging batten which operates the mechanism connected with the shipper-rod when the quills are empty, substantially as described.

3. A threaded stud, an operating disk or plate placed thereon, and which has a lateral movement upon the stud, a mechanism for causing the disk to revolve, a pawl for preventing the backward movement of the disk, and a weighted cord attached to the disk for causing it to return to position upon the stud, combined with means which is operated by the disk at predetermined times, a mechanism for operating the shipper-rod, and which is moved into the line of travel by said means, the shipper-rod, and a swinging batten which operates the mechanism for operating the shipper-rod when the quills are empty, substantially as set forth.

4. In a loom, a threaded supporting-stud, a revolving disk placed thereon and provided with an operating-stud upon its outer side, and which disk has a lateral movement upon the said stud, combined with an operating mechanism for causing the disk to revolve forward, a pawl for preventing the disk from revolving backward, and a mechanism for causing the disk to return to position upon the stud when the pawl is raised, combined with suitable mechanism operated by said disk at predetermined times, a shipper-rod connected to and operated by said mechanism, and a swinging batten which is brought into the line of travel with the batten, substantially as shown.

5. In a loom, the combination with a ship per-rod and batten, of stop mechanism operatively connected with said shipper-rod normally out of operative relation with said batten, a rotary member arranged to move the stop mechanism into operative relation with the batten, and means for imparting a step-bystep movement to said rotary member.

6. In a loom, the combination with a batten and shipper-rod, of stop mechanism operatively connected with the shipper-rod and normally located out of the line of travel of the batten, actuating mechanism for moving said stop mechanism into the line of travel of the batten and means for causing the operation of said actuating mechanism when the quills are emptied.

7. In a loom, an operating-shaft, a rotary disk operated from said shaft, a stop mechanism, and a batten, combined with means whereby the disk is made to operate the stop mechanism at predetermined times, whereby the machine is stopped at the same time that the thread is exhausted from all the bobbins, substantially as shown.

8. In a loom, the combination with the batten and shipper-rod, of stop mechanism operatively connected with the shipper-rod and normally out of operative relation with the batten, a rotary disk provided with a stud arranged to engage the stop mechanism and to move it into operative relation with the batten, means for rotating said disk to cause the engagement of the stud with the stop mechanism, and means for returning the disk to its normal position.

9. In a loom, the combination with the batten and shipper-rod, of stop mechanism operatively connected with the shipper-rod and normally out of operative relation with the batten,a threaded stud,an interiorly-threaded disk upon said stud and provided with a projection designed to engage the stop mechanism, means for imparting a step-by-steprotation to the disk, a pawl engaging the disk to prevent its backward rotation, and means for returning the disk to its normal position EDWIN oLDFInLn.

Witnesses:

FRANK I-I. ALLEN, ALONZO M. LUTHER. 

